CVE-2026-23647: Glory RBG-100 Auth Bypass Vulnerability

CVE-2026-23647 Overview

Glory RBG-100 recycler systems using the ISPK-08 software component contain hard-coded operating system credentials that allow remote authentication to the underlying Linux system. Multiple local user accounts, including accounts with administrative privileges, were found to have fixed, embedded passwords. An attacker with network access to exposed services such as SSH may authenticate using these credentials and gain unauthorized access to the system. Successful exploitation allows remote access with elevated privileges and may result in full system compromise.

Critical Impact

This hard-coded credentials vulnerability enables unauthenticated remote attackers to gain administrative access to Glory RBG-100 cash recycling systems via embedded OS credentials, potentially leading to full system compromise of financial infrastructure.

Affected Products

• Glory RBG-100 Recycler Systems
• ISPK-08 Software Component
• Underlying Linux Operating System on affected devices

Discovery Timeline

• 2026-02-17 - CVE-2026-23647 published to NVD
• 2026-02-18 - Last updated in NVD database

Technical Details for CVE-2026-23647

Vulnerability Analysis

This vulnerability represents a classic case of CWE-798 (Use of Hard-coded Credentials), a critical security weakness frequently found in embedded systems and IoT devices. The Glory RBG-100 recycler systems, which are automated cash handling devices commonly deployed in financial institutions and retail environments, ship with fixed credentials embedded directly in the ISPK-08 software component.

The flaw is particularly severe because multiple user accounts are affected, including those with administrative privileges. Unlike dynamically generated or user-configurable credentials, hard-coded passwords cannot be changed by system administrators, leaving all deployed devices permanently vulnerable unless firmware is updated.

Root Cause

The root cause of this vulnerability stems from insecure development practices where credentials were embedded directly into the software at compile time. The ISPK-08 software component contains fixed username/password combinations for local Linux system accounts. These credentials appear to be consistent across all deployed devices, meaning that once discovered, they can be used to compromise any accessible Glory RBG-100 system running the vulnerable software version.

This type of design flaw often results from convenience-driven development decisions, where fixed credentials simplify deployment or support access. However, this approach directly violates secure coding principles and creates a systemic vulnerability across the entire product line.

Attack Vector

The attack vector is network-based and requires no prior authentication or user interaction. An attacker with network access to an exposed Glory RBG-100 system can authenticate directly to administrative services such as SSH using the hard-coded credentials.

The exploitation process is straightforward: an attacker identifies a Glory RBG-100 system on the network, connects to an exposed service (SSH on port 22 is the most likely target), and authenticates using the embedded credentials. Upon successful authentication, the attacker gains access to the underlying Linux operating system with privileges corresponding to the compromised account.

For accounts with administrative privileges, this provides complete control over the device, enabling the attacker to exfiltrate data, modify system configurations, install backdoors, or pivot to other systems on the network. Given that these devices handle cash transactions, compromise could also facilitate financial fraud or manipulation of transaction records.

Detection Methods for CVE-2026-23647

Indicators of Compromise

• Unexpected SSH login attempts or successful authentications to Glory RBG-100 systems from unknown IP addresses
• Anomalous user activity on system accounts that should be dormant or service-only
• Changes to system configuration files or installation of unauthorized software on recycler systems
• Network connections from recycler systems to external or unexpected internal hosts

Detection Strategies

• Monitor authentication logs on Glory RBG-100 systems for login attempts using known hard-coded account names
• Implement network segmentation monitoring to detect unauthorized access attempts to cash handling infrastructure
• Deploy behavioral analytics to identify anomalous command execution patterns on recycler system consoles
• Use SIEM rules to correlate SSH authentication events from Glory systems with known attack patterns

Monitoring Recommendations

• Configure centralized logging for all Glory RBG-100 systems to aggregate authentication and system events
• Establish baseline activity profiles for recycler systems to enable anomaly detection
• Implement real-time alerting for any administrative logins to cash handling devices outside maintenance windows
• Regularly audit active sessions and user accounts on deployed recycler systems

How to Mitigate CVE-2026-23647

Immediate Actions Required

• Isolate Glory RBG-100 systems from untrusted networks and restrict SSH access to authorized management hosts only
• Implement network segmentation to prevent direct access to recycler systems from general network zones
• Deploy firewall rules to block inbound SSH connections except from designated jump hosts or management VLANs
• Monitor all authentication attempts to recycler systems while awaiting vendor patches

Patch Information

Organizations should contact Glory directly for information about firmware updates that address the hard-coded credentials in the ISPK-08 software component. Refer to the VulnCheck Advisory for additional technical details and remediation guidance. The Glory Global Homepage provides customer support channels for obtaining security updates.

Workarounds

• Implement strict network access controls to prevent unauthorized systems from reaching SSH ports on recycler devices
• Deploy host-based firewalls on recycler systems to whitelist only specific management IP addresses
• Use VPN or bastion host architectures to add an authentication layer before recycler system access
• Consider disabling SSH service entirely if remote management is not operationally required
• Implement network monitoring to detect and alert on any connection attempts to recycler SSH services

# Example network isolation configuration (iptables)
# Restrict SSH access to Glory RBG-100 systems
# Only allow connections from management network (192.168.100.0/24)

iptables -A INPUT -p tcp --dport 22 -s 192.168.100.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 22 -j DROP

# Log all rejected SSH connection attempts for monitoring
iptables -A INPUT -p tcp --dport 22 -j LOG --log-prefix "SSH_BLOCKED: "